CGlib 代理 例子

package proxy;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class TestCgLib {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Enhancer enhancer = new Enhancer();
		enhancer.setSuperclass(A.class);
		enhancer.setCallback(new MyMethodInterceptor());
		A a = (A) enhancer.create();
		a.print();
	}

}

class MyMethodInterceptor implements MethodInterceptor {
	@Override
	public Object intercept(Object arg0, Method method, Object[] arg2, MethodProxy proxy) throws Throwable {
		System.out.println("Before invoke " + method);
		Object result = proxy.invokeSuper(arg0, arg2);
		System.out.println("After invoke" + method);
		return result;
	}

}

class A {
	int i = 0;
	public void print() {
		System.out.println("i-" + i);
	}
}

最后打印出来是：

Before invoke public void proxy.A.print()
i-0
After invokepublic void proxy.A.print()